in the 1980s Scotish Historian James Craig and German Historian Gerhard Schäfer worked together and published the Bert Assirati Record Book. In germany Schäfer published this under the name "Wrestling Archives No. 18 - Bert Assirati".

According to these record Assirati made his debut as a professional wrestler on 28.10.1928 in London against Robert Cook. He defeated Cook. First he trained under Coach Guido Ronga in the Ashdown Club. At this time he was a amateur wrestler and it was Ronga, who brings him to the professional wrestling scene. Assirati's became also instructions from Peter Gotz and Jack Carroll.

During 1932 he wrestled under the alias of "John Swan" at the Waverley Market in Edinburgh. In late 1931 he came to the USA and was associated by Renato Gardini. Assirati wrestled mainly on the east coast of America.

In 1934 he had a match against George Gregory for the British Heavyweight Championship. He defeated Gregory in Manchester. Until 1939 he wrestled the most time in London. From 1944 to 48 he had many fights in Edinburgh and Newcastle. On 27.01.1945 he defeated Gregory again in Manchester for the British Heavyweight Championship. Then he defeated Dave Armstrong on 08.06.1946 in Newcastle for the British Heavyweight Championship.

The record claimed that Assirati defeated Yvar Martinson on 04.03.1947 in London for the "World Championship".

1948: Assirati made a tour to BelgiumMay 1952: He made his german debut in Berlin

After his matches in South Africa he returned to England around September 1955. He made his retirement in late 1959, but made a comeback in 1960. His last matches on that record was against Joe Cornelius on 15.05.1960 in Brighton (won) and May 1960 against John DaSilva (won) in Bristol.